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Charla Smart Antennas Miércoles, 16 de Mayo de 2012 14:27 Martes 22 de Mayo 09:00 horas Colegio de Ingenieros de Chile A.G. Av. Santa María 0208, Providencia. El Capitulo Chileno Conjunto de Antennas & Propagation Society y Communication Society del IEEE, junto con la Comisión de Telecomunicaciones del Colegio de Ingenieros de Chile A.G. tienen el agrado de invitarlo a la Conferencia (en inglés) del Dr. Tapan K. Sarkar, sobre el tema: "Smart Antennas". Esta conferencia se realizará en conjunto con la Rama IEEE USACH, a las 09:00 horas del día martes 22 de Mayo, en el Auditorio del Colegio de Ingenieros de Chile A.G. 1/4 Charla Smart Antennas Miércoles, 16 de Mayo de 2012 14:27 Inscripciones: [email protected] Fecha límite para inscripción: viernes 18 de mayo a las 13:00 horas. ENTRADA LIBERADA Dr. Tapan K. Sarkar Department of Electrical Engineering and Computer Science Syracuse University, Syracuse, New York USA ABSTRACT: The term smart antenna is often used in mobile communications to describe an adaptive process designed to improve the capacity of a base station by focusing the radiated electromagnetic energy on transmit while also improving the gain pattern on receive from a mobile. Here, the transmitted signals from a base station are spatially directed to an intended mobile. We present a Direct Data Domain Least Squares (D3LS) approach to estimate the signal in the presence of jammer interference, clutter and thermal noise. In this technique no statistical information about the clutter is necessary. Also, since no covariance matrix needs to be formed in this procedure, the process can be implemented in real time on an inexpensive digital signal processing (DSP) chip. We also present an extension of this technique to include traditional statistical processing when dealing with Space Time Adaptive Processing (STAP). One unique topic in this talk is a multistage analysis procedure that combines electromagnetic analysis with signal processing. Initially, electromagnetic principles are applied to compensate for the effects of mutual coupling between antenna elements, including the effect of nonuniformity in the spacing between the elements, and the presence of near field scatterers. Then a direct data domain methodology is implemented to yield the signal of interest. A deterministic model for the signal of interest yields a lower value for the Cramer-Rao bound than stochastic 2/4 Charla Smart Antennas Miércoles, 16 de Mayo de 2012 14:27 methods. In this approach, no statistical information about the interference environment is necessary. This makes it possible to perform real time processing in a dynamic environment. These principles will be illustrated for space-time adaptive processing of real experimental data obtained from an airborne multi-channel radar system. TAPAN KUMAR SARKAR (http://web.syr.edu/~tksarkar) received the B. Tech. degree from the Indian Institute of Technology, Kharagpur, India, in 1969, the M.Sc.E. degree from the University of New Brunswick, Fredericton, Canada, in 1971, and the M.S. and Ph.D. degrees from Syracuse University; Syracuse, New York in 1975. From 1975 to 1976 he was with the TACO Division of the General Instruments Corporation. He was with the Rochester Institute of Technology, Rochester, NY, from 1976 to 1985. He was a Research Fellow at the Gordon McKay Laboratory, Harvard University, Cambridge, MA, from 1977 to 1978. He is now a Professor in the Department of Electrical and Computer Engineering, Syracuse University; Syracuse, NY. His current research interests deal with numerical solutions of operator equations arising in electromagnetics and signal processing with application to system design. He obtained one of the "best solution" awards in May 1977 at the Rome Air Development Center (RADC) Spectral Estimation Workshop. He has authored or coauthored ten books including the latest ones "Iterative and Self Adaptive Finite-Elements in Electromagnetic Modeling" and “Wavelt Applications in Engineering Electromagnetics” which were published in 1998 and 2002, respectively by Artech House, more than 210 journal articles and numerous conference papers and has written chapters in 28 books. The book on “Smart Antennas” will be published by John Wiley in March 2003. Dr. Sarkar is a registered professional engineer in the State of New York. He received the Best Paper Award of the IEEE Transactions on Electromagnetic Compatibility in 1979 and in the 1997 National Radar Conference. He received the College of Engineering Research Award in 1996 and the chancellor’s citation for excellence in research in 1998 at Syracuse University. He was elected Fellow of the IEEE in 1991. He was an Associate Editor for feature articles of the IEEE Antennas and Propagation Society Newsletter, and he was the Technical Program Chairman for the 1988 IEEE Antennas and Propagation Society International Symposium and URSI Radio Science Meeting. Currently he is a distinguished lecturer for the IEEE Antennas and Propagation society. He is on the editorial board of Journal of Electromagnetic Waves and Applications and Microwave and Optical Technology Letters. He has been appointed U.S. Research Council Representative to many URSI General Assemblies. He was the Chairman of the Intercommission Working Group of International URSI on Time Domain Metrology (1990-1996). Dr. Sarkar is a member of Sigma Xi and International Union of Radio Science Commissions A and B. He received the title Docteur Honoris Causa from Universite 3/4 Charla Smart Antennas Miércoles, 16 de Mayo de 2012 14:27 Blaise Pascal, Clermont Ferrand, France in 1998 and the Friends of Clermont Ferrand award in 2000. 4/4